Overview	9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]
Overview	Note 1. Overview Soleno Therapeutics, Inc. (the Company or Soleno) was incorporated in the State of Delaware on August 25, 1999, and is located in Redwood City, California. The Company initially established its operations as Capnia, a diversified healthcare company that developed and commercialized innovative diagnostics, devices and therapeutics addressing unmet medical needs. During 2017, Soleno received stockholder approval to amend its Amended and Restated Certificate of Incorporation to change its name from “Capnia, Inc.” to “Soleno Therapeutics, Inc.” and merged with Essentialis, Inc. After the merger, the Company’s primary focus has been the development and commercialization of novel therapeutics for the treatment of rare diseases and the Company divested itself of its prior business efforts. The Company’s lead candidate is Diazoxide Choline Controlled Release tablets, or DCCR, once-daily oral tablets for the treatment of Prader-Willi Syndrome, or PWS. DCCR has orphan designation for the treatment of PWS in the United Statesas well as in the European Union. DCCR has been evaluated in a Phase III clinical development program (C601 or DESTINY PWS) with top line results announced in June 2020. Although the trial did not meet its primary endpoint of change from baseline in hyperphagia, significant improvements were observed in two of three key secondary endpoints and the Company is evaluating the data from the C601 and C602 studies to determine next steps. DESTINY PWS was a 3-month randomized, double-blind placebo-controlled study, which completed enrollment in January 2020, with 127 patients at 29 sites in the U.S. and U.K. Patients who complete treatment in DESTINY PWS are eligible to receive DCCR for up to 36 months in C602, an open-label extension study.

Overview

9 Months Ended

Sep. 30, 2020

Note 1. Overview

Soleno Therapeutics, Inc. (the Company or Soleno) was incorporated in the State of Delaware on August 25, 1999, and is located in Redwood City, California. The Company initially established its operations as Capnia, a diversified healthcare company that developed and commercialized innovative diagnostics, devices and therapeutics addressing unmet medical needs. During 2017, Soleno received stockholder approval to amend its Amended and Restated Certificate of Incorporation to change its name from “Capnia, Inc.” to “Soleno Therapeutics, Inc.” and merged with Essentialis, Inc. After the merger, the Company’s primary focus has been the development and commercialization of novel therapeutics for the treatment of rare diseases and the Company divested itself of its prior business efforts.

The Company’s lead candidate is Diazoxide Choline Controlled Release tablets, or DCCR, once-daily oral tablets for the treatment of Prader-Willi Syndrome, or PWS. DCCR has orphan designation for the treatment of PWS in the United Statesas well as in the European Union.

DCCR has been evaluated in a Phase III clinical development program (C601 or DESTINY PWS) with top line results announced in June 2020. Although the trial did not meet its primary endpoint of change from baseline in hyperphagia, significant improvements were observed in two of three key secondary endpoints and the Company is evaluating the data from the C601 and C602 studies to determine next steps. DESTINY PWS was a 3-month randomized, double-blind placebo-controlled study, which completed enrollment in January 2020, with 127 patients at 29 sites in the U.S. and U.K. Patients who complete treatment in DESTINY PWS are eligible to receive DCCR for up to 36 months in C602, an open-label extension study.